Adaptive predefined‐time observer design for generalized strict‐feedback second‐order systems under perturbations

• Published in: International journal of robust and nonlinear control Vol. 33; no. 1; pp. 311 - 335
• Main Authors: Lv, Jixing, Ju, Xiaozhe, Jing, Liang, Wang, Changhong
• Format: Journal Article
• Language: English
• Published: Bognor Regis Wiley Subscription Services, Inc 10.01.2023
• Subjects: adaptive coefficients; adaptive predefined‐time observer; Design parameters; Feedback; generalized strict‐feedback second‐order system; Initial conditions; Observers; peaking observation error; Perturbation; Robot arms; Transient performance; upper bound of the settling time; Upper bounds

This article studies the predefined‐time observation problem of generalized strict‐feedback second‐order systems commonly encountered in practice. A nonaffine control input, a matched perturbation, and nonlinear functions satisfying the Hölder growth condition are considered. A class of adaptive pre...